From 9f8c543dc81f0c4239acae6713f5414eb7dc681d Mon Sep 17 00:00:00 2001
From: sin
Date: Fri, 13 Mar 2015 11:00:46 +0000
Subject: Rework fortify implementation to use extern inline

Overriding functions with macros is legal in C but a lot of software
is not prepared for it.  Use the extern inline method to achieve the
same result.
---
 include/strings.h | 25 ++++++++++++-------------
 1 file changed, 12 insertions(+), 13 deletions(-)

(limited to 'include/strings.h')

diff --git a/include/strings.h b/include/strings.h
index d7118f3..1adbf51 100644
--- a/include/strings.h
+++ b/include/strings.h
@@ -10,32 +10,31 @@
 #if defined(_GNU_SOURCE) || defined(_BSD_SOURCE) || defined(_POSIX_SOURCE) \
  || (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE+0 < 200809L) \
  || (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE+0 < 700)
-static inline __attribute__ ((always_inline))
-void
-__fortify_bcopy(const void *src, void *dest, size_t n)
+#undef bcopy
+#undef bzero
+extern void __bcopy_orig(const void *, void *, size_t)
+	__asm__(__USER_LABEL_PREFIX__ "bcopy");
+extern __inline __attribute__((__always_inline__,__gnu_inline__))
+void bcopy(const void *src, void *dest, size_t n)
 {
 	size_t bos = __builtin_object_size(dest, 0);
 
 	if (n > bos)
 		__builtin_trap();
-	return bcopy(src, dest, n);
+	return __bcopy_orig(src, dest, n);
 }
 
-static inline __attribute__ ((always_inline))
-void
-__fortify_bzero(void *src, size_t n)
+extern void __bzero_orig(void *, size_t)
+	__asm__(__USER_LABEL_PREFIX__ "bzero");
+extern __inline __attribute__((__always_inline__,__gnu_inline__))
+void bzero(void *src, size_t n)
 {
 	size_t bos = __builtin_object_size(src, 0);
 
 	if (n > bos)
 		__builtin_trap();
-	return bzero(src, n);
+	return __bzero_orig(src, n);
 }
-
-#undef bcopy
-#define bcopy(src, dest, n) __fortify_bcopy(src, dest, n)
-#undef bzero
-#define bzero(src, n) __fortify_bzero(src, n)
 #endif
 
 #endif
-- 
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